The pair had a fun stare down session and showed off their best, Diaz brothers-style mean mugs in the images.

While not much has been released about what they were doing in the gym, the likely explanation is that the CW stars are just getting some time in the gym before their shows premiere next month.

However, Lotz's "#Flash x #LegendsOfTomorrow" comment could be a hint that West and Sara Lance may end up fighting each other during one of the crossovers. Perhaps it'll be a part of the possible fight club, run by the villainous Roulette, who's set to cause a few headaches for the Woman of Steel on Supergirl this year.

Patton and Lotz aren't the first Arrowverse actresses who've spent time kicking butt in the gym lately. Arrow's Katie Cassidy and Emily Bett Rickards, also known as Black Canary and Felicity Smoak, recently trained with UFC welterweight title challenger, Stephen "Wonderboy" Thompson and Elias "The Spartan" Theodorou ahead of last month's UFC event in Vancouver.

Maybe one of these badass TV stars is responsible for giving Green Arrow himself, Stephen Amell, that bloody nose this summer. Only time will tell.

Image via Stephen Amell's Facebook

Are you excited for what's in store for the Arrowverse this year? Let us know in the comments below.